Fix BL-756: "multilingual settings" instead of "one language"

The problem was when both Lang1 and Lang2 were the same (e.g. English)
the code would say that lang2 was unselected by default, thus also
deselecting lang1.
Merge pull request #147 from BloomBooks/BL-768

Fix BL-756: "multilingual settings" instead of "one language"